Re: [Libvir] PATCH: Don't request polkit auth if client is root

This patch makes two adjustments to the way policy kit authentication is done. - Currently the server unconditionally ask the client to do policykit authentication. This is unnecessary if the remote client is running as root, which we can check via UNIX socket credentials. Unconditionally asking plays havoc with SSH tunneling, so this patch makes it check the socket credentials &not ask for auth if the client is UID==0 - The virsh client will unconditionally call polkit-auth to request credentials. This is also unneccessary if the client is running as root, so this patch makes it skip that step as root. The patch is bigger than it seems because removing an if() conditional made a huge chunk be re-indented.